Doubles and pump guns have been in decline since WWII. All the returning GIs knew the value of semi autos and looked for their shotguns to have the ability to shoot rapidly, without their having to work the action. Pump guns are a real tough sell around here. Plain barrels are often untouched at gunshows. High grade stuff still has a following but plain barrels, well used guns are hard to sell at any price. Worse you can buy a new Mossberg 500/835 for 300-425 NIB and trying to sell well used against that type of price point is hard. New against used is a hard sell if you don't have a interest in the old guns more than the new ones. Plus new comes in camo which seems to be the color of choice for a lot of buyers these days.
I know that people will point out the difference in quality between a Winchester and Mossberg and while they are right, I know from personal experience Mossberg 500s and 835s work perfectly every time I pull the trigger. I have had a 500 for almost 40 years and a 835 for nearly 20 years as bad weather backup guns and loaners and both have gone bang every time I pulled the trigger. Their actions are not as smooth as my Model 12 but they work reliably and I would not cry if I dropped either of them overboard. Just reach down and pull it out and shake it out.
